AMC 8 2009 Problem 1
AMC8 2009 年第 1 题
方程与不等式★★☆☆☆
Bridget bought a bag of apples at the grocery store. She gave half of the apples to Ann. Then she gave Cassie 3 apples, keeping 4 apples for herself. How many apples did Bridget buy?
Bridget 在水果店买了一包苹果。她把一半苹果给了 Ann，然后她把 3 个苹果了 Cassie，自己留了 4 个。那么 Bridget 总共买了多少个苹果？
- A.3
- B.4
- C.7
- D.11
- E.14
正确答案 · Correct Answer
E
解析 · Solution
Solution 1
If we set up an equation, we find out because 3 apples were left after giving half, then four away. We can simplify the equations to The answer is
You can work backwards and add 3 apples that she gave to Cassie to the 4 she currently has, which results in 7, and then multiply by 2 since she gave half the apples to Ann, resulting in . Or you can use algebra: let x be the number of apples, we have 3+4+x/2 = x solving for x, we get 14 resulting in ..disher
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